Grinding tool



J. F. ROSE GRINDING TooL .h me 17, 1924.

Flled Aug. 21, 1922 afl l l'nve or.'

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Patented June 17, 1924. i

UNITED 4,STATES GaI-NDING Toor..

Application led August 21, 1922. Serial No. 583,127.

To nl] infront t may concern.'

Be it known that l, JAMES F. Rosie, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio. have invented a new and useful Grinding Tool, of which the following is a specification.

This invention relates to improvements in grinding tools and more especially to a grinding tool having a rotary abrading disk suitable for operating on the opposing surfaces of two contact-members of means for opening and closing the primary circuit in an ignition system of an automobile.

The primary object of this invention is to produce a highly practical and convenient grinding tool of thecharacter indicated which can be readily applied in relation to said surfaces in ysuch 'a manner'that said surfaces are adapted to be simultaneously abraded by opposite faces respectively of the abrading disk of said tooland-thereby maintained in proper condition;

Another object isto render the construction of my improved grinding tool simple and durable, and to4 facilitate the assemblage of the, component parts of the tool.

With these objects in view, and to attain' any other object hereinafter appearing, this invention consists in certain features of constructionT and combinations and relative arrangements of parts, hereinafter described in this specification, pointed out in the claims, and illustrated inthe accompanying drawings,

ln said drawings, Figure 1 is an elevation of a grinding tool embodying my invention and shows the tool in an operative position in relation to a distributer of anignition system for an automobile. Fig. 2 is a vertical section taken along the line 2-2 in Fig'. 1. Fig. 3 is a vertical section taken along` the line 3-.3 in Fig. 2. Fig. 4 is a sectional view of a portion of the tool on a larger scale than shown in Figs. 1.` 2 and 3.

Referring to said drawings, 5 indicates the top surface of a distributer for opening and closing the prima-ry circuit of an ignition system of an automobile, and 6 and 7, (see Fig. 2) indicate two contact-members which are arranged in line endwise. The contact member 6 is stationary and shown extending horizontally through and secured in any approved manner to a post 8 which projects upwardly from the surface 5. The

.member in its circuit-closing position;

movable contact-member 7 is provided, ad-r -contact member 7 is movable endwise and` extends through and has bearing in an insulating tubular member 9 in a stationary post 10 projecting upwardly from the surface 5. The posts 8 and 9 are spaced' laterally, and the contact-members 6 and 7` prO-A jecti toward each other between said posts.v

The movable contact-member 7 is provided between its forward extremity and the post 10 with an external annular shoulder 12 spaced from said extremity and from said post, and a coiled spring 13 is mounted on said contact-memberbetween said post and said shoulder and acts to retain said contact- The jacent its opposite extremity, with an annular recess 15 adapted to be engaged by a suitably operated lever (not shown) for shift-y ing said contact-member endwise against the action of the springl.

My improved grinding tool comprises a stock or shank 16 which preferably consists of a vmetal bar adapted tobe held in anyv approved manner above the stationary contact-member 6. f f

The bar or shank 1.6'(see Fig. 3) is shown as having a projecting member 17 formed at the lower end and projecting endwise of.

the shank centrally between the adjacent extremities of' the longitudinal edges of the shank. and has two correspondingly rscrewthreaded parallel holes 18 formed in and extending endwise of said'shank between said projecting member 17 and opposite longitudinal edges respectively ofthe shank, and said shank is provided at its' opposite end with a handle 19. A'screw 20 is threaded into the shank 16 at one ofthe holes 18 and extends from said shank in the direction in which the. projecting member 17 projects and beyond the outer extremity of saidprojecting member and forms an endwise adjustable leg for my improved grinding tool, andobviously said leg isreadjusted endwise in the one direction-or'the other by rotating the screw 20 in the required direction.

A. short shaft 21 extends laterally through and has bearing in the projecting member 17 of the shank 16, and said shaft is operatively provided with an abrading diskv 22 which is arranged as required and large enough in diameter to cause said disk to extend farther than the projecting member 17 in the direction in which said projecting member projects, and .the screw 2O is shown extending farther in said direction than said disk.

The construction and relative arrangement of the parts are such that the disk 22 is not only operatively connected with the shaft 21 but adapted to extend between and simultaneously voperate on the opposing surfaces of the, endwise alined. contact-members 6 and 7 upon the illustrated application'V of myimproved grinding tool. The disk 22 is removably secured to the shaft 21 by ascrew23V arranged axially of and threaded into the shaft as-shown in Figs. 2 anda. The screw 23 extends through the disk'22 andhas a head 25 at the outer face of said' disk. Preferably the projecting member 17 of the sha-ft 16 (see Fig. 4) has itsfside which faces the disk 22 overlapped by an annular flange 26 formed on and externally of the shaft 21, and said disk is interposed and clamped by and between said'ange and the head 25 of the screw 23.

Myimproved grinding tool not only comprises a legv20 arranged at one end portion andfextending and adjustable longitudinally ofthe shank 16. and the abrading disk 22 arranged at oneside of said end portion of said shank and rotatable with-the shaft 21,

vbut also comprises a driven pinion 27 which is supported from and` operatively connected with said shaft at the opposite side of said end portion of said shank, and a driving pinion 28 is supported from the shank and spaced' from the first-mentioned and driven pinion and shown intergeared, by two suitable applied gears 30 and 31. with said driven pinion. The gears 30 and` 31y are supported from the shank 16, and the` driving pinion 28 is provided with a crank 29 for rotating said pinion.

By thel hereinbefore described constructionv it will be observed that the pinions 27'and 28 andthe gears 30 and 31 are arl'ranged at one and the same side of the shank 16, and that the provision of the shank with two. holes 18 permits the location ofthe legsforming screw 20 at the one or theA other sideof the pinion-bearing shaft 21 as desired.

f shank which has at one end a projecting member, a shaft extending laterally through and having bearing inl said projecting member, means for rotating said shaft, an abrading diskwhich` is rotatable` with saidshaft and large enough in diameter to cause said disk to extend farther than the aforesaid projecting member in the direction in which said projecting member projects, and a leg secured to the aforesaid shank at one side of said shaft and extending farther in said direction thantheaforesaid disk, said leg being removable from a position at one side into a position at the opposite .side of said shaft.

2. A grinding tool of the character indicated comprising a stock or shank which has at one end two holes extending to one and the same end of the shank and spaced apart and also has a projecting member formed at said end between the adjacent extremities of said holes, a shaftextending laterally through and having bearing in said projecting member, means for rotating said shaft, an abrading disk which is rotatable with said shaft and large` enough in diameter to cause said disk to extend farther than .the aforesaid projecting member in the direction in which said projecting member projects, and a leg engaging one of the aforesaid holes and extending farther in said direction than the aforesaid disk, said leg being removable from the one to the other of said holes. n

3. A grinding tool of the character indicated comprising a. stock or shank which has at one end two substantially parallel correspondingly screw-threaded holes extending to one and the same end of the shank-and spaced apart and also has, a projecting member formed at said end between the adjacent extremities of'said holes, a shaft extending laterally through and having bearing y"in said projecting member, means for rotating, said shaft, an abrading disk which is rotatable with said shaft and large enough in diameter to cause said disk to extend farther than the aforesaid projecting member in the directionin which said projecting member projects, and a leg threaded into the aforesaid shank at one of the aforesaid holes and extending farther in said direction than the aforesaid disk, said leg being removable from the one to other of said holes.

In testimonyfwhereof, I sign the foregoing specification, this 17th day of August, 1922.

JAMES F. ROSE. 

